Abstract: A muzzle brake device for a handgun comprises a housing disposed at the end of the barrel thereof, which includes a conical expansion chamber tapered outwardly from the barrel bore of the gun and connecting with a cylindrical passageway at the chamber's muzzle end. A strike plate having a truncated planar surface in the shape of the truncated planar surface of a hollow, annular, truncated cylinder, facing the breech end of the gun, is positioned in the passageway. A number of pressure port passageways communicating between the interior of the device, and the outside thereof, are provided to reduce muzzle rise and for other beneficial purposes.

Abstract: A small vise for fly tying, holding small parts and the like features a pair of jaws which are slidable within an enveloping nose piece. The jaws and nose are formed with complementary sliding surfaces which together with a transverse guide pin between the jaws assure that the gripping faces of the jaws are parallel throughout their travel as well as impart a self-locking ability to the jaws.